This tool written on go lang, help to run postman collections in parallel mode. So you can use it for load testing based on postman collections. As a runner it uses newman.
Simple golang-based load test application using YAML documents as specification
An opinionated, multi-language, build tool based on Docker and Docker Compose
go-wrk - a HTTP benchmarking tool based in spirit on the excellent wrk tool (https://github.com/wg/wrk)
Testing framework for easily testing GORM-based data access layers
Web and API based SMTP testing